To:sot_shift from: Dan Schwartz date: 19 Jul 00, 12:00noon EDT Subject: SOT shift report 2000-07-19 L362 -------- See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Jul_19_2000_L362.txt. Shift L362. Start at 201:12:00 GMT = 08:00am 19 Jul EDT End 12:00 noon 19 Jul SOT Lead DAS (Times will be given in GMT on day 201. In general times are rough, not precise.) PLAN Continue running load JUL1700. Finish OBSID 121, ACIS-S/HETG observation of the SNR N132D, Then go through perigee and make ACIS CTI measurements, and resume observation of N132D with OBSID 1828 upon perigee egress. Next Comms 201:10:40 to 12:40 202:00:10 to 01:10 202:09:40 to 10:40 202:21:00 to 22:00 203:07:25 to 08:25 203:15:20 to 16:20 204:00:10 to 02:10 EVENTS Status at AOS, 201:10:43, was as follows: PCAD MODE = NPNT CONTROL LAW FLAG = NPNT Stars: = 5 FIDS = 3 RA = 81.332 deg DEC = -69.646 deg ROLL = 144.242 deg Format = 2 OBSID = 121 N132D SIM FA = -467 SIM TSC = 75623 (ACIS-S) HETG = IN ( 6.3 deg) LETG = OUT (78.3 deg) HRC-I HV is ON (NOTE: snapshot and shift report now give EPHIN rates in physical units, previously was in counts per readout.) EPHIN Geom = LARG E1300 = 0.6 LT 10.0 (RADMON P4GM = 15.8 LT 300. Triggers) P41GM = 0.3 LT 8.47 A-leak = 0.6160 mu-a B-leak = 0.1080 mu-a Descending through 105796 km. 12:40 LOS. Status essentially unchanged. Descending through 96735 km. ACIS focal plane temperature -119.9 deg C. NOTES/ISSUES/PROBLEMS At 12:00, ACE rates were continuing a very slow (factor of 2 per day) decay from last weekend, with fluxes about 1000. However, at about 13:30 both GOES and ACE see start of a proton increase. At ~15:15 the 2-hr fluence monitor tripped, for an average flux of 50,000 over the previous two hours. We are safed for perigee right now but will need to consider possible action at the 8:10 pm EDT contact this evening. As of 15:30, ACE rates are falling steeply. From the 9am status meeting: 3 supports, 5 dumps, all data dumped from the SSR. Uplinked the next segment of the JUL1700 load. On-board loads are good until 204:19:09, with one more segment to be uplinked to complete this week. Products were sent out yesterday for the JUL2300 load, the initial review will be at 2pm today. FOT/CSC have noticed a jump in the clock correlation correction coefficient over the time period of the radiation event. FOT will look for other possible effects due to the high particle fluxes which were encountered by Chandra. Meetings: 2pm today for load review 3pm today for the weekly OTG telecon 10am tomorrow, thursday, ACIS operations team 9:20am Friday, debrief of last weekends radiation operations Friday afternoon, tagup in preparation of support of the HETG retraction, which will be carried out by the on-board loads on Sunday evening. Quick look data: OBSID Target Time Comment ----- ------ -------------- ------- 00241 NGC 4486 (M87) 199:16:22 ACIS/HETG Looks good. 00717 GX 9+1 200:03:39 ACIS/HETG Looks good. 00716 GX 5-1 200:06:57 ACIS/HETG Looks good. ------------------------------------------------------- Dan Schwartz, MS #3 das@head-cfa.harvard.edu phone: (617)495-7232 FAX: (617)495-7356 cell phone: (617)512-5627 pager: 800-759-8352 PIN 1636502 or e-mail 1636502@skytel.com -------------------------------------------------------